(;GM[1]FF[4]SZ[19]
GN[Black to play--this fails]
PC[http://senseis.xmp.net/?RTGProblem20/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem20/Attempts

Black to play--this fails]
PL[B]

AB[oa][qa][ob][pb][nc][pc][od][pd][qd][rd]
AW[ra][mb][nb][mc][qc][rc][md][sd][ne][oe][pe][qe][re][se]
LB[qb:a][nd:b]

;B[rb]C[B1]MN[1]
;W[sb]C[W2]MN[2]

;LB[qb:a][nd:b]
)
